Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 111, Issue 1-3, Pages 596-603Publisher
ELSEVIER
DOI: 10.1016/j.micromeso.2007.09.005
Keywords
periodic mesostructured organosilicas; solid acid catalysts; sulfonic acid functionalized PMO; heterogeneous catalysis; heptanal condensation
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Periodic mesostructured organosilicas (PMO) were first synthesized using 1,2-bis(triethoxysilyl)ethylene (BTENE) under acidic conditions using Pluronic 123 as surfactant. The ethylene bridges were then arylated with benzene using AlCl3 as catalyst. These materials were further treated with sulfuric acid for the sulfonation of the phenyl moieties yielding a new preparation of sulfonic acid functionalized PMO. Ordered hexagonal mesostructures with surface areas up to 440 m(2)/g and narrow pore size distribution (around 5.3 nm) were obtained. This work thus provides a new example of chemical modification for the conception of functionalized PMO catalysts. Liquid phase self-condensation of heptanal was performed at 75 degrees C in the presence of these catalysts and the results were compared with those obtained with several other heterogeneous acid catalysts. (C) 2007 Elsevier Inc. All rights reserved.
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